helmeri, Characidium Zanata [A. M.], Sarmento-Soares [L. M.] & Martins-Pinheiro [R. F.] 2015:372, Figs. 1-4 [Zootaxa 4040 (no. 3); ref. 34023] Rio Ribeirão, on road between Cumuruxatiba and Corumbau, tributary of rio Cahi, Prado, Brazil, 17°00'45"S, 39°12'07"W, elevation 17 meters. Holotype: MNRJ 42610. Paratypes: MBML, MNRJ, MZUSP. •Valid as Characidium helmeri Zanata, Sarmento-Soares & Martins-Pinheiro 2015 -- (Silva et al. 2020:7 [ref. 37809]). Current status: Valid as Characidium helmeri Zanata, Sarmento-Soares & Martins-Pinheiro 2015. Crenuchidae: Characidiinae. Distribution: South America: coastal rivers (southern Bahia State, Brazil). Habitat: freshwater.